Spiral plate condenser



Nov. 29, 1927. 1,650,862

F. A. BORZYCH SPIRAL PLATE CONDENSER Filed Feb. 15. 1926 2 Sheets-Sheet 1 INWN'IOR EA .Borjych ATTORNm Nov. 2 9, 1927. 1,6505862 F. A. BORZYCH SPIRAL PLATE CONDENSER Filed Feb. 15, 1926, 2 Sheets-Sheet 2 BY WW V50 ATTORNEYS Patented Nov. 29, 1927.

UNETED STATES l,fi5-0,862 PATENT orrics.

FRANK A. BORZYCH, OF IYIINATARE, NEBRASKA.

SPIRAL PLATE CONDENSER.

Application filed February 15, 1926. Serial No. 88,391.

My invention relates to improvements in spiral plate condensers, and it consists in the combinations, constructions, and 'arrangements herein described and claimed.

In the standard condenser, one-half the circumference of the dial is divided into either one hundred equal parts or one hunall of the stations are still crowded into onehalf a. revolution of the condenser.

An object of my invention is to provide a spiral plate condenser which permits the dial to be rotated through a number of revolutions between the points of minimum capac ity of the condenser and maximum capacity, the dial being graduated throughout its entire circumference for this purpose, whereby a very fine adjustment may be effected throughout the entire-range of the condenser.

A further object of my invention is to provide a device of the type described which has means associated with the dial for showing the number of turns of the dial.

A further object of my invention isto provide a device of the type described which is relatively simple-in construction, durable and efiicient for the purpose intended.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings, forming part of this application, in which Figure 1 is a top plan view of the device,

Figure 2 is a front elevation of a portion of the device,

Figure 3 is a section along the line 33 of Figure 2,

Figure 4 is a section along the line H of Figure 1, and

Figure 5 is asection along the line 55 of Figure l.

In carrying out my invention, I provide supporting members 1 and 2, these members being referably made of insulatin material. t should be noted at this point that the drawings show a condenser of rather large proportions, this showing being made for the purpose'of clarity. It is obvious that the condenser mayben'iadeof any size desired, the size being controlled b -th capacity desired;

The members '1 and 2 are connec ted together by posts 3, these posts having rediiced threadedportions', see F igurel, fdiip assing through openings in the members '1 and v2. The threaded portions project'thi'ou'gh the members and receivenutsififiln the drawings, I have-shown three of fthese po sts.

or more posts mayjbeprovided One of the posts, see" Figure 1,cai ri'es alock nut 6 which is adapted to clampa wire 7 between it and the nut 5. This arrangement'forms the stator plate terminal connection for the condenser. To the posts 3, I secure a spiralistator plate 8. This plate is made of conducting materialfand may bef'co mposed. of'a' plw rality of plates connected together forforming. a good electrical" connection between the plates. In Figure 5, I show 'howlthfefposts In case a large condenser-is to be, inad,' six are provided with recesses '9 'f or'receiving the spiral statorplate 8.

I will now describe the means for'moving a spiral rotor plate 10 between the different turns of thespiral stator.plate,'whereby the capacity of the condenser maybe changed at will. A screw l1 ha's a reduced threaded portion 12 which passes' thliough an openmg 13' in the supporting member 1. Upon 'the reduced threaded .portion 12, I mount adjusting nuts 14 and 15... These nuts clam to the supporting member 1 and may be a justed upon the portion 12 for moving the screw 11 longitudinally when adjustin the spiral rotor 10 with respect to the spira "stator. The nuts 14 and 15 alsoprevent rotation of the screw 11 with respect to the supporting members 1 and 2.

A threaded terminal 16 projects from the portion 12 and is adapted to receive a lock nut 17, see Figure 1. The lock nut 17 clamps a wire 18 to the screw 11, thus forming a terminal for the rotating element 10. The wires 7 and 18 may be connected to any circuit using a condenser, such as a radio circuit.

Upon the screw 11, I mount a rotor carrying nut 19. This nut has a spiral groove 21 therein for receivin the spiralrotor plate 10. The plate is rigi ly secured to the nut and-is adapted to be rotated when the nut is rotated. i

are slidably received in bores 23 in the nut' 19, and have their ends secured in a flange The means for rotating the nut upon the screw 11 consists in the present instanceof a pair of rotor driving pins 22. These pins ing sleeve will rotate the nut 19 upon the dial 2= shmg radua s into. o eh id i f revllfi e s A ferent positions;- whereas the d i'alri of the th rougha' number, of revolutions; Some screw 11. The driving sleeve is mounted in a bushing 28, the bushing being disposed in an opening in the supporting member 2 and being secured thereto by a nut 29 The screw 11 preferably has a compound thread thereon, the. pitch of the thread being the same as the pitch of the spiral plates 8 and 10. In this way, a rotation of the nut 19,v will cause the spiral rotor to weave inside the spiral stator, the turns of the rotor being spaced midway between the turns of the, stator; :Asheretoiore, stated, adjustmentcf the n,ut,s'14jand 1 5 will move the screw 11; for ermitting' the longitudinal movement of" te'rotor with respectto the stator. i

The membejs' lapd 2, together with the parts that they support. may be secured to 'agpanel board" 30y i fjdesi red. II provide stub "posts Bligr securgngtheme inber 2- 'to the and board 3Q; In the present drawing, 1 iiave shownl\threefof 'these posts, and have shown the posts as, being spaced between e post The Pe ts, 3 r id p at t thear ng sleeve and a dial 32'j-ils, provided for ,cove'rino nuts 33 of h s'P QSB The tiriassI- e ap eie H i few -boa 30, d liiia t ined. sad 4 ,tprey d dfi can a n .t r i. e? t e; grace in the dial the; see fifiq e ri n sla e t; qtv eils tha s:

. hrei e r ria-aw re. finft e e fit qas m Qs'may; be stage: i

ant egg ire a thssei r te id scene. of meme new t jifrqnrm e equal parts at enough to; permit the dial 32m; be rotate dea eetin's, means s nece et o nd c ingthe number of-revol-utipnsm'a'de by the diali32, Ttijsj rneans maybe a dial having numbers thereon. these numbers advancing one di'git forcach rcvolntionof'th e dial. or

the numbers may refer to various. wavelengths such as the number I00 appearing when the. dialj'has made one complete rev0 lntion. and the number 150 appearing when the dialhas made an-additional half revolution, etc.

, In Figures 1 and 4, I show a specific mechanism for indicating the number of rcvohr tions of the dial, this mechanism COInpliSing a-dial actuated by a cord connection between the dial and the driving sleeve 25. It is obvious that a gear connection between these two elements may be made without departing from the spirit and scope of my invention.

I mount a casing 40 upon a projection 41 carried by one of the posts 3. A collar 42 bears against the casing and keeps the casing in abutting relation with the inner surface of the panel board 30. The casin is provided with a groove 43 therein this groove receiving a cable 44. The cable has an end secured to the casing 40, and has its other end secured to the driving sleeve 25. It will further be noted from Figure 4 that the cable is passed over an idler pulley 4:").

' A dial 46 is secured to the casing 40 and has numbers 47 thereon which are adapted to be brought into registration with an opening 48 in the pancl board 30. A coil spring 49 is connected to the member 41 and to the casing 40 in a manner to cause the casing to wind up the cable 44 thereon as'fast as-t-he cable is unwound from the driving sleeve 25.

From the foregoing description-of the we rious parts of the device, the operation there of may be readily understood. Let us assume that the condenser has tencomplete revolutions of the'spiral stator and'sp-iral rotor and compare this with 'a standardcondenser which'can only be swung through one-half of a revolution. Assume that the dialfof; the standard'condenser has onehalf of its circumference graduatedint'o one hundred equal parts. The dial' 32 is also graduated' into one-hundredequal parts but these onehundred'parts-are spread over the entire circumtercn'ce, a-nd. it w-fll therefore appear'thatthe graduations on-the dial 32 aretwice as largeas those-on-the dial of the stan dardcondenseru- In addition-to this, if ten complete revolutions are-'provided in the spiral stator andspiral rotor,=:the-dial 32 may; therefore be 'rota-ted"th rough' ten. complete? revolutions.-' Let F us further assume I that thecapacity offthe two-condensers is thesame; It will I therefore be seen ch'atthe dial 32 may be swung into one-thonsand difstandard condenser may be swung into only one hundred difl'erent positionspthes e positions b'ein one-half the size of 'theigraduations on t e standard dial. 7 It Willfurther be apparent that a movement of the dial 32 through ten graduations is'equal toe; movement of one graduation in the standard dial. It is therefore obvious that this condenser can accurately tune instationsib the condenser is employed in- 'a-radio-receiving set, which are almost impossible to tune in ith the standard condenser. due to the fact that the stations are so close together on the dial.

The dial 46 working in-combinationwith the dial 32 provides a simple mechanism the screw 11 and move the spiral rotor into mesh with or out of mesh from said spiral stator. This movement of course changes the capacity of the condenser. The device is compact in construction and operates efficiently for the purpose intended.

I claim:

1. A spiral condenser, comprising a pair of spaced-apart supporting members, a sleeve rotatably carried by one of said supporting members and having a central bore at one end, a dial secured to the other end,

, gitudinal 'a threaded shaft having a cylindrical extension arranged to enter in and be supported by the sleeve, said shaft having a reduced threaded portion arranged to pass through the other of said supporting members, adjusting nuts carried by the reduced threaded portion of the shaft for adjusting the position of the shaft with respect to the supports, a spiral stator, a traveling nut carried by said threaded shaft and having lonbores, drive pins extending through said bores and having their ends secured to said sleeve, a spiral rotor carried by the nut and adapted to enter between the convolutions of the spiral stator when the nut is rotated, and means for indicating the relative positions of the rotor and stator.

2. A spiral condenser, comprising a pair of spaced-apart supporting members, a sleeve rotatably carried by one of said supporting members and having a central bore at one end, a dial secured to the other end, a threaded shaft having an extension arranged to enter in and be supported by the sleeve, means for adjustably securing the opposite end of the shaft to the other of said supporting members, a spiral stator, a traveling nut carried by said threaded shaft and having longitudinal bores, drive pins extending through said portion and havin their ends secured to said sleeve, a spira rotor carried by the nut and adapted to enter between the convolutions of the spiral stator when the nut is rotated, and means for indicating the relative positions of the rotor and stator. f v

3. A spiral condenser, comprising a pair of spaced-apart supporting members, a sleeve rotatably carried by one of said supporting members, a dial secured to the sleeve at one end, a threaded shaft supported by the sleeve at one end, "means'for su porting said shaft at the other-end on t e other of said supporting "members, said means permitting the longitudinal adjustment of the shaft with respect to the supporting member and the sleeve, a spiral stator, a traveling nut carried by said threaded shaft, means carried by the sleeve for rotating the nut, a spiral rotor carried by the nut and adapted to enter between the convolutions of the spiral stator when the nut is rotated, and means {or indicating the relative positions of the rotor and stator.

FRANK A; BORZYCH. 

